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Title
Nanostructures of chemically modifed multi‑walled carbon nanotubes and poly(3‑hexylthiophene) to improve photophysic/ photovoltaic features
Type of Research Article
Keywords
Poly(3-dodecylthiophene) · Carbon nanotube · Organic solar cell · Charge-carrier dynamics · Photophysics
Abstract
Multi-walled carbon nanotube/poly(3-hexylthiophene) (CNT/P3HT) and CNT-graft-poly(3-dodecylthiophene) (PDDT)/ P3HT nanohybrids were applied in active layers to study the efects of these nanostructures on the polymer solar cell (PSC) performance. The charge-carrier dynamics and photophysics were studied in the binary and ternary systems based on P3HT, pre-developed nanostructures and/or phenyl-C71-butyric acid methyl ester (PC71BM) through the electrochemical impedance spectroscopy and morphological analyses. The weaker bimolecular recombination in the photoactive layer, consisting of CNT-graft-PDDT/P3HT nanostructures, was confrmed by short-circuit current (Jsc) and open-circuit voltage (Voc) measurements as a function of light intensity. PSC composed of P3HT:PC71BM:CNT-graft-PDDT/P3HT PSC exhibited the highest PCE of 4.18% with signifcantly increased Jsc and Voc.
Researchers Afsaneh Hadi (First Researcher)، Mohammad Hossein Hekmatshoar (Second Researcher)، (Third Researcher)، Samira Agbolaghi (Fourth Researcher)